Use gauss-jordan elimination to solve the following system of equations x + y + z =2
2x-3y+z= -11
-x+2y-z=8
the answers are above

12 is 33 1/3% of 36 what is the whole

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Simplify this expression. 8x 16(x + y)